Answer

The girls switched colors on me. Getting them dressed in the morning, Hailey said to Riley, "do you want to change colors today, Riley?" Which they thought was the funniest thing ever. I did ok, though I still called them the wrong name a few times (which I do anyway). It's really a weird psychological thing; I know who is who regardless of color shirt, I know they've switched, yet I'm just so used to seeing them in certain colors. Luckily it only lasted til lunchtime when Riley made such a big mess she needed a new shirt, and they both decided it was time to change back!

And this is what happens when one decides to take out her pig tails: